package com.javacodegeeks.snippets.desktop;
import java.awt.Container;
import java.awt.Graphics;
import java.awt.Point;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class KeyFrame extends JPanel implements KeyListener {
private Point start = new Point(0, 0);
private Point end = new Point(0, 0);
public static void main(String[] args) {
JFrame jFrame = new JFrame();
jFrame.setTitle("ArrowSketch");
jFrame.setSize(300, 300);
jFrame.addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
Container p = jFrame.getContentPane();
p.add(new KeyFrame());
jFrame.setVisible(true);
}
public KeyFrame() {
addKeyListener(this);
}
@Override
public void keyPressed(KeyEvent keyEvent) {
int key = keyEvent.getKeyCode();
int i;
if (keyEvent.isShiftDown()) {
i = 5;
} else {
i = 1;
}
if (key == KeyEvent.VK_LEFT) {
add(-i, 0);
} else if (key == KeyEvent.VK_RIGHT) {
add(i, 0);
} else if (key == KeyEvent.VK_UP) {
add(0, -i);
} else if (key == KeyEvent.VK_DOWN) {
add(0, i);
}
}
@Override
public void keyReleased(KeyEvent evt) {
}
@Override
public void keyTyped(KeyEvent evt) {
}
@Override
public boolean isFocusTraversable() {
return true;
}
public void add(int x, int y) {
end.x += x;
end.y += y;
Graphics graphics = getGraphics();
graphics.drawLine(start.x, start.y, end.x, end.y);
graphics.dispose();
start.x = end.x;
start.y = end.y;
}
}
